Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Increase block_sequence array size [Why] It's possible to generate more than 50 steps in hwss_build_fast_sequence, for example with a 6-pipe asic where all pipes are in one MPC chain. This overflows the block_sequence buffer and corrupts block_sequence_steps, causing a crash. [How] Expand block_sequence to 100 items. A naive upper bound on the possible number of steps for a 6-pipe asic, ignoring the potential for steps to be mutually exclusive, is 91 with current code, therefore 100 is sufficient.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before de67e80ab48f1f23663831007a2fa3c1471a7757; affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before e55c5704b12eeea27e212bfab8f7e51ad3e8ac1f; affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before bf1666072e7482317cf2302621766482a21a62c7; affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before 3a7810c212bcf2f722671dadf4b23ff70a7d23ee |
| Linux / Linux | affected 4.15; unaffected 0 before 4.15; unaffected 6.6.93 through 6.6.*; unaffected 6.12.31 through 6.12.*; unaffected 6.14.9 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.